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Title: Regional seismic event identification and improved locations with small arrays and networks. Final report, 7 May 1993-30 September 1995

This final report contains a summary of our work on the use of seismic networks and arrays to improve locations and identify small seismic event. We have developed techniques to migrate 3-component array records of local, regional and teleseismic wavetrains to directly image buried two- and three-dimensional heterogeneities (e.g. layer irregularities, volumetric heterogeneities) in the vicinity of the array. We have developed a technique to empirically characterize local and regional seismic code by binning and stacking network recordings of dense aftershock sequences. The principle motivation for this work was to look for robust coda phases dependent on source depth. We have extended our ripple-fired event discriminant (based on the time-independence of coda produced by ripple firing) by looking for an independence of the coda from the recording direction (also indicative of ripple-firing).
Authors:
; ;
Publication Date:
OSTI Identifier:
273142
Report Number(s):
AD-A--305683/5/XAB
CNN: Contract F19628-93-K-0021; TRN: 62120036
Resource Type:
Technical Report
Resource Relation:
Other Information: DN: Original contains color plates: All DTIC/NTIS reproductions will be in black and white; PBD: 20 Sep 1995
Research Org:
Scripps Institution of Oceanography, La Jolla, CA (United States)
Country of Publication:
United States
Language:
English
Subject:
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; 35 ARMS CONTROL; NUCLEAR EXPLOSION DETECTION; SEISMIC SURVEYS; SEISMIC ARRAYS; REGIONAL ANALYSIS; ARMS CONTROL; VERIFICATION; PROGRESS REPORT